#app {
    width: 80%;
    margin: auto;
    padding: 10px;
    text-align: center;
}

.el-dialog {
    padding: 0 20px;
}

.add-btn {
    width: 100%;
    display: flex;
    display: -webkit-flex; /* Safari */
    justify-content: flex-start;
    padding: 10px;
}